Step 4. Estimate the quantity of refrigerant
(grams or pounds) in the largest single refrigerant
circuit of the new equipment. The designer will
research catalog data from different manufacturers
in order to get an approximation.
Step 5. Determine the volume (cubic meters or
cubic feet) of the indoor space which is planned to
house the new refrigeration equipment.
Step 6. Identify the "System Application
Requirements" from the applicable table in ASHRAE 15
based upon the information identified in the
previous steps (e.g., safety group, occupancy,
system probability, refrigerant quantity, and indoor
space volume). The "System Application
Requirements" will dictate applicable refrigerant
limitations as well as occupied space or mechanical
room requirements.
ASHRAE 15 refers to a mechanical room as a machinery
room, however the terms are synonymous. On
mechanical room design, ASHRAE 15 touches on
criteria concerning equipment placement, ventilation
design, door and passageway restrictions,
refrigerant monitoring, open-flame devices,
pressure-relief and purge piping. In addition to
mechanical room design, ASHRAE 15 also touches on
criteria concerning refrigerant piping, signs,
self-contained breathing apparatus (SCBA), and
miscellaneous installation restrictions. (SCBAs
cannot be considered MCA funded items and are
therefore not included in this specification.)
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2.1
STANDARD COMMERCIAL PRODUCTS
Materials and equipment shall be standard products of a manufacturer
regularly engaged in the manufacturing of such products, which are of a
similar material, design and workmanship. The standard products shall have
been in satisfactory commercial or industrial use for 2 years prior to bid
opening. The 2 year use shall include applications of equipment and
materials under similar circumstances and of similar size. The 2 years
experience shall be satisfactorily completed by a product which has been
sold or is offered for sale on the commercial market through
advertisements, manufacturer's catalogs, or brochures. Products having
less than a 2 year field service record shall be acceptable if a certified
record of satisfactory field operation, for not less than 6000 hours
exclusive of the manufacturer's factory tests, can be shown. Products
shall be supported by a service organization. System components shall be
environmentally suitable for the indicated locations.
2.2
NAMEPLATES
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NOTE: In a salt water environment substitute
acceptable non-corroding metal, such as but not
limited to nickel-copper, 304 stainless steel, or
SECTION 15700A
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